JPH08200182A - Electromagnetic type fuel injection valve and mounting structure thereof - Google Patents

Electromagnetic type fuel injection valve and mounting structure thereof

Info

Publication number
JPH08200182A
JPH08200182A JP7027681A JP2768195A JPH08200182A JP H08200182 A JPH08200182 A JP H08200182A JP 7027681 A JP7027681 A JP 7027681A JP 2768195 A JP2768195 A JP 2768195A JP H08200182 A JPH08200182 A JP H08200182A
Authority
JP
Japan
Prior art keywords
fuel injection
valve
cylinder
injection valve
electromagnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7027681A
Other languages
Japanese (ja)
Inventor
Takuya Fujikawa
拓哉 藤河
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Corp
Original Assignee
Zexel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zexel Corp filed Critical Zexel Corp
Priority to JP7027681A priority Critical patent/JPH08200182A/en
Priority to DE19600403A priority patent/DE19600403C2/en
Priority to US08/585,477 priority patent/US5706787A/en
Publication of JPH08200182A publication Critical patent/JPH08200182A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • F02M61/163—Means being injection-valves with helically or spirally shaped grooves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Gasket Seals (AREA)

Abstract

PURPOSE: To provide an electromagnetic type fuel injection valve which is constituted to satisfy sealing ability, heat resistance, and a pressure resistance, which are demanded by an engine of a cylinder injection system and reduce a change amount of a lift amount of a needle valve due to deformation occasioned by a mounting load and to provide the mounting structure thereof. CONSTITUTION: By noticing that sealing is effected at the proximity of a cylinder 39 to which an electromagnetic type fuel injection valve 30 is attached and a portion spaced away from the proximity, in the position which approaches the cylinder case 39, a first seal part 44 wherein a first gasket (a corrugate washer 46) is arranged in a position in the vicinity of the cylinder 39 between the electromagnetic type fuel injection valve 30 and the cylinder; and a second seal part 45 wherein a second gasket (plate washer 48) is arranged in a position, spaced further away from the cylinder 39 than from a first seal part between the electromagnetic type fuel injection valve 30 and the cylinder are provided.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は電磁式燃料噴射弁および
その取付け構造にかかるもので、とくに筒内噴射システ
ムにおける電磁式燃料噴射弁およびその取付け構造に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic fuel injection valve and its mounting structure, and more particularly to an electromagnetic fuel injection valve in a cylinder injection system and its mounting structure.

【０００２】[0002]

【従来の技術】従来からのいわゆる低圧噴射用の電磁式
燃料噴射弁は、これをエンジンのインテークマニホール
ドに取り付け、このインテークマニホールド内にガソリ
ンなどの燃料を噴射している。図５にもとづき概説す
る。2. Description of the Related Art A conventional electromagnetic fuel injection valve for so-called low pressure injection is attached to an intake manifold of an engine, and fuel such as gasoline is injected into the intake manifold. An outline will be given based on FIG.

【０００３】図５は、上記従来の電磁式燃料噴射弁１の
断面図であって、電磁式燃料噴射弁１は、コネクター２
と、バルブハウジング３と、ノズルカバー４と、磁性体
からなる燃料供給用パイプ５と、スプリングシート６
と、バルブシート７と、コネクター２からの制御信号に
より励磁および消磁する電磁コイル８と、を有する。FIG. 5 is a cross-sectional view of the above-mentioned conventional electromagnetic fuel injection valve 1, in which the electromagnetic fuel injection valve 1 has a connector 2
A valve housing 3, a nozzle cover 4, a fuel supply pipe 5 made of a magnetic material, and a spring seat 6.
A valve seat 7 and an electromagnetic coil 8 that is excited and demagnetized by a control signal from the connector 2.

【０００４】燃料供給用パイプ５に対向して図中下方に
筒状のアーマチャー９、およびこのアーマチャー９に一
体的に可動なニードルバルブ１０を設ける。バルブシー
ト７の先端に噴射孔１１を形成し、バルブスプリング１
２によってニードルバルブ１０をこの噴射孔１１の方向
に常時付勢してバルブシート７のシート部７Ａにシート
させている。A cylindrical armature 9 facing the fuel supply pipe 5 and a needle valve 10 movable integrally with the armature 9 are provided in the lower part of the drawing. An injection hole 11 is formed at the tip of the valve seat 7, and the valve spring 1
The needle valve 10 is constantly urged in the direction of the injection hole 11 by means of 2 to be seated on the seat portion 7A of the valve seat 7.

【０００５】ガソリンなどの燃料は、燃料供給用パイプ
５の図中上部から第１の燃料通路１３に供給され、第１
の燃料通路１３からアーマチャー９内部の第２の燃料通
路１４、およびバルブシート７とニードルバルブ１０と
の間の第３の燃料通路１５を通って噴射孔１１に至る。Fuel such as gasoline is supplied to the first fuel passage 13 from the upper portion of the fuel supply pipe 5 in the figure,
From the fuel passage 13 to the injection hole 11 through the second fuel passage 14 inside the armature 9 and the third fuel passage 15 between the valve seat 7 and the needle valve 10.

【０００６】ニードルバルブ１１の段部と、バルブスト
ッパー１６との間の間隔をニードルバルブ１０のリフト
量Ｌとし、電磁コイル８の励磁によってアーマチャー９
およびニードルバルブ１０がバルブスプリング１２の付
勢力に抗して一体的にリフトし、燃料が噴射孔１１から
エンジンのインテークマニホールド１７の内部に噴射さ
れる。電磁コイル８の消磁によってアーマチャー９およ
びニードルバルブ１０がバルブスプリング１２の付勢力
により原位置に復帰し、噴射孔１１を閉鎖する。The distance between the stepped portion of the needle valve 11 and the valve stopper 16 is the lift amount L of the needle valve 10, and the armature 9 is excited by exciting the electromagnetic coil 8.
And the needle valve 10 lifts integrally against the urging force of the valve spring 12, and the fuel is injected from the injection hole 11 into the intake manifold 17 of the engine. The demagnetization of the electromagnetic coil 8 causes the armature 9 and the needle valve 10 to return to their original positions by the urging force of the valve spring 12 to close the injection hole 11.

【０００７】こうした構成の電磁式燃料噴射弁１をイン
テークマニホールド１７に取り付ける構造としては、Ｎ
ＢＲ（ニトリルブタジエンゴム）などによる第１のイン
シュレーター１８および第２のインシュレーター１９を
介して、フューエルレール２０によってインテークマニ
ホールド１７方向に荷重をかけ、その取付け孔２１に取
り付けるものである。As a structure for mounting the electromagnetic fuel injection valve 1 having such a configuration on the intake manifold 17, there are N
A load is applied in the direction of the intake manifold 17 by the fuel rail 20 via the first insulator 18 and the second insulator 19 made of BR (nitrile butadiene rubber) or the like, and is attached to the attachment hole 21.

【０００８】しかしながら、電磁式燃料噴射弁をエンジ
ンのシリンダーヘッドに取り付けてシリンダー内に高圧
燃料を直接噴射する、いわゆる筒内噴射システムにおい
ては、上述の低圧型の電磁式燃料噴射弁１とは異なり、
高圧のシリンダー内に燃料を噴射する必要があるととも
に、シリンダーからの燃焼ガスにさらされるため、こう
した高圧型の電磁式燃料噴射弁を取り付けるにあたって
は、以下のような諸条件を満足しなければならない。However, in the so-called in-cylinder injection system in which the electromagnetic fuel injection valve is attached to the cylinder head of the engine and the high pressure fuel is directly injected into the cylinder, unlike the above-mentioned low pressure type electromagnetic fuel injection valve 1. ,
Since it is necessary to inject fuel into a high-pressure cylinder and it is exposed to combustion gas from the cylinder, the following conditions must be satisfied when installing such a high-pressure electromagnetic fuel injection valve. .

【０００９】すなわち、第一に、高圧型の電磁式燃料噴
射弁はシリンダーヘッドにこれを取り付け、そのノズル
先端はシリンダー内にさらされるので、燃焼圧力に耐え
得る取付け構造であること、図５で説明したようなマニ
ホールド取付け型の噴射弁に比較して燃焼にともなう振
動が多大であるため耐振性を有する取付け構造であるこ
と、燃焼ガスのシール性が良好であること、および熱変
形によるリフト量の変化を抑制可能なように放熱性が良
好であることなどが要求される。That is, first, a high pressure type electromagnetic fuel injection valve is attached to a cylinder head, and its nozzle tip is exposed to the inside of the cylinder. Therefore, the attachment structure must withstand combustion pressure. Compared to the manifold-mounted injection valve as described above, the vibration associated with combustion is greater, so it has a vibration-proof mounting structure, good combustion gas sealability, and lift due to thermal deformation. It is required that the heat dissipation is good so that the change of can be suppressed.

【００１０】第二に、電磁式燃料噴射弁の取付け荷重に
よるリフト量の変化が許容範囲内にあることが要求され
る。Second, it is required that the change in the lift amount due to the mounting load of the electromagnetic fuel injection valve is within the allowable range.

【００１１】第三に、電磁式燃料噴射弁の周辺部にはウ
ォータージャケット（図示せず）など、他の構造部品が
あるために、上述のような要求に応えるための取付け構
造としても、周辺寸法が極力細いものであることが要求
される。Thirdly, since there are other structural parts such as a water jacket (not shown) in the peripheral portion of the electromagnetic fuel injection valve, the peripheral structure also serves as a mounting structure for meeting the above requirements. The dimensions are required to be as thin as possible.

【００１２】しかして、従来の電磁式燃料噴射弁１の取
付け構造では上述のような諸要求を満たすことは非常に
困難であるという問題がある。However, there is a problem that it is very difficult to satisfy the above-mentioned requirements with the conventional mounting structure of the electromagnetic fuel injection valve 1.

【００１３】[0013]

【発明が解決しようとする課題】本発明は以上のような
諸問題にかんがみなされたもので、筒内噴射システムの
エンジンにおいて要求される前述の各種諸条件を満たす
ことができる電磁式燃料噴射弁およびその取付け構造を
提供することを課題とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an electromagnetic fuel injection valve capable of satisfying the above-mentioned various conditions required in an engine of a cylinder injection system. Another object of the present invention is to provide a mounting structure therefor.

【００１４】また、本発明は、電磁式燃料噴射弁の取付
け荷重による電磁式燃料噴射弁の変形にもとづくニード
ルバルブのリフト量の変化量を極力小さくすることがで
きる電磁式燃料噴射弁およびその取付け構造を提供する
ことを課題とする。Further, according to the present invention, an electromagnetic fuel injection valve capable of minimizing the amount of change in the lift amount of the needle valve due to the deformation of the electromagnetic fuel injection valve due to the mounting load of the electromagnetic fuel injection valve, and the mounting thereof. The challenge is to provide a structure.

【００１５】さらに、本発明は、取り付けた電磁式燃料
噴射弁から大気中への燃料（ガソリン）の漏れを防止す
ることができる電磁式燃料噴射弁およびその取付け構造
を提供することを課題とする。Further, it is an object of the present invention to provide an electromagnetic fuel injection valve capable of preventing leakage of fuel (gasoline) from the attached electromagnetic fuel injection valve to the atmosphere and its mounting structure. .

【００１６】[0016]

【課題を解決するための手段】すなわち本発明は、電磁
式燃料噴射弁を取り付けるシリンダーからの近接部およ
びこの近接部から離れた部位においてそれぞれシールす
ることに着目したもので、第一の発明は、バルブハウジ
ングと、このバルブハウジングに設けた電磁コイルと、
この電磁コイルの励磁に応答するアーマチャーと、燃料
の噴射孔を形成したバルブシートと、このバルブシート
を固定するノズルホルダーと、上記電磁コイルの励磁に
応じて上記アーマチャーとともに上記バルブシートのシ
ート部からリフトすることにより上記噴射孔からエンジ
ンのシリンダー内に燃料を噴射可能とするニードルバル
ブと、を有する電磁式燃料噴射弁を、該エンジンのシリ
ンダーヘッドの取付け孔に取り付ける電磁式燃料噴射弁
の取付け構造であって、上記シリンダーヘッドの取付け
孔の、上記シリンダーに近接した位置において、当該電
磁式燃料噴射弁との間に第１のガスケットを配置した第
１のシール部と、この第１のシール部より上記シリンダ
ーから離れた位置において、当該電磁式燃料噴射弁との
間に第２のガスケットを配置した第２のシール部と、を
有することを特徴とする電磁式燃料噴射弁の取付け構造
である。That is, the present invention focuses on sealing at a portion close to a cylinder to which an electromagnetic fuel injection valve is attached and at a portion apart from this portion, and the first invention is A valve housing and an electromagnetic coil provided in the valve housing,
From the seat part of the valve seat together with the armature that responds to the excitation of the electromagnetic coil, the valve seat that forms the fuel injection hole, the nozzle holder that fixes the valve seat, and the armature according to the excitation of the electromagnetic coil. An electromagnetic fuel injection valve mounting structure for mounting an electromagnetic fuel injection valve having a needle valve capable of injecting fuel into the cylinder of the engine from the injection hole by lifting, to a mounting hole of a cylinder head of the engine And a first seal portion having a first gasket arranged between the mounting hole of the cylinder head and the electromagnetic fuel injection valve at a position close to the cylinder, and the first seal portion. At a position further away from the cylinder, a second gasket is provided between the electromagnetic fuel injection valve and the cylinder. A mounting structure of an electromagnetic fuel injection valve, characterized in that it comprises a second seal portion arranged the door, the.

【００１７】第二の発明は、バルブハウジングと、この
バルブハウジングに設けた電磁コイルと、この電磁コイ
ルの励磁に応答するアーマチャーと、燃料の噴射孔を形
成したバルブシートと、このバルブシートを固定するノ
ズルホルダーと、上記電磁コイルの励磁に応じて上記ア
ーマチャーとともに上記バルブシートのシート部からリ
フトすることにより上記噴射孔からエンジンのシリンダ
ー内に燃料を噴射可能とするニードルバルブと、を有す
る電磁式燃料噴射弁であって、当該電磁式燃料噴射弁を
取り付ける上記エンジンのシリンダーヘッドの取付け孔
の、上記シリンダーに近接した位置において第１のガス
ケットを配置した第１のシール部と、上記シリンダーか
ら離れた位置において第２のガスケットを配置した第２
のシール部と、を設けるとともに、上記バルブハウジン
グと上記ノズルホルダーとの接合部を、この第２のシー
ル部よりも上記シリンダー側に配置したことを特徴とす
る電磁式燃料噴射弁である。A second aspect of the invention is a valve housing, an electromagnetic coil provided in the valve housing, an armature responsive to the excitation of the electromagnetic coil, a valve seat having a fuel injection hole, and a fixed valve seat. An electromagnetic type having a nozzle holder that enables to inject fuel from the injection hole into the cylinder of the engine by lifting from the seat portion of the valve seat together with the armature according to the excitation of the electromagnetic coil. A fuel injection valve, a first seal portion having a first gasket arranged at a position close to the cylinder in a mounting hole of a cylinder head of the engine to which the electromagnetic fuel injection valve is mounted, and a first seal portion separated from the cylinder. Second gasket with a second gasket in place
And a joint portion between the valve housing and the nozzle holder is arranged closer to the cylinder side than the second seal portion.

【００１８】上記第１のガスケットは、これを断面波型
とすることができる。The first gasket may have a corrugated cross section.

【００１９】上記第１のガスケットは、ステンレス材、
銅材、あるいはこれらにテフロンコーティングを施した
材料のうちいずれかの材料から構成することができる。The first gasket is a stainless steel material,
The material may be a copper material or a material obtained by applying Teflon coating to these materials.

【００２０】[0020]

【作用】本発明による電磁式燃料噴射弁およびその取付
け構造においては、第１のシール部および第２のシール
部を設ける、二重シール構造としたので、シリンダー内
からの燃焼ガスを的確にシールすることができる。In the electromagnetic fuel injection valve and its mounting structure according to the present invention, the first seal portion and the second seal portion are provided, and the double seal structure is provided, so that the combustion gas from the inside of the cylinder is accurately sealed. can do.

【００２１】しかも、第１のシール部はシリンダーに近
接した部位にこれを設けるとともに、第２のシール部は
シリンダーから離れた部位にこれを設けることとしたの
で、より効果的なシール性能を得ることができる。Moreover, since the first seal portion is provided at a portion close to the cylinder, and the second seal portion is provided at a portion away from the cylinder, more effective sealing performance is obtained. be able to.

【００２２】さらに、当該電磁式燃料噴射弁のバルブハ
ウジングとノズルホルダーとの接合部は、第２のシール
部よりもノズル先端側（シリンダー側）にこれを配置し
たため、万一この接合部から燃料漏れが発生しても、第
２のシール部により電磁式燃料噴射弁から外部への燃料
漏れを防止することができる。Furthermore, since the joint between the valve housing of the electromagnetic fuel injection valve and the nozzle holder is arranged on the nozzle tip side (cylinder side) with respect to the second seal portion, the fuel should be removed from this joint. Even if leakage occurs, the second seal portion can prevent fuel leakage from the electromagnetic fuel injection valve to the outside.

【００２３】とくに第１のシール部を構成する第１のガ
スケットを断面波型とすれば、その弾性力によって、さ
らにシール性能を向上させることができるとともに、取
付けのための締め付けによる変位の所定ストローク範囲
にわたって取付け荷重をほぼ一定とすることが可能でニ
ードルバルブのリフト量の変化を許容範囲内のものとす
ることができる。In particular, if the first gasket constituting the first seal portion has a corrugated cross section, the elastic force thereof can further improve the sealing performance and a predetermined stroke of displacement due to tightening for mounting. The mounting load can be made substantially constant over the range, and the change in the lift amount of the needle valve can be made within the allowable range.

【００２４】[0024]

【実施例】つぎに本発明の一実施例による電磁式燃料噴
射弁およびその取付け構造を図１ないし図４にもとづき
説明する。ただし、図５と同様の部分には同一符号を付
し、その詳述はこれを省略する。図１は、電磁式燃料噴
射弁３０の断面図であり、この電磁式燃料噴射弁３０
は、ノズルホルダー３１を有し、このノズルホルダー３
１にバルブシート７を固定している。DESCRIPTION OF THE PREFERRED EMBODIMENTS An electromagnetic fuel injection valve and its mounting structure according to an embodiment of the present invention will be described below with reference to FIGS. However, the same parts as those in FIG. 5 are designated by the same reference numerals, and the detailed description thereof will be omitted. FIG. 1 is a sectional view of the electromagnetic fuel injection valve 30.
Has a nozzle holder 31, and this nozzle holder 3
The valve seat 7 is fixed to 1.

【００２５】さらに、前記アーマチャー９に相当する平
板状のアーマチャー３２を有し、このアーマチャー３２
と一体的にニードルバルブ１０が可動する。なおニード
ルバルブ１０には、第２の燃料通路１４と第３の燃料通
路１５とを連通する連通孔３３を形成してある。Further, the armature 32 has a flat plate-like armature 32 corresponding to the armature 9.
The needle valve 10 is moved integrally with this. The needle valve 10 is formed with a communication hole 33 which connects the second fuel passage 14 and the third fuel passage 15 to each other.

【００２６】アーマチャー３２と燃料供給用パイプ５と
の間の間隔によってニードルバルブ１０のリフト量Ｌを
設定している。The lift amount L of the needle valve 10 is set by the distance between the armature 32 and the fuel supply pipe 5.

【００２７】電磁式燃料噴射弁３０を取り付けるシリン
ダーヘッド３８には、噴射孔１１が臨むシリンダー３９
および噴射弁取付け孔４０を形成し、噴射弁取付け孔４
０にはシリンダー３９の近接部から離れる方向に、順に
開口径を大きくした第１の取付け段部４１、第２の取付
け段部４２および第３の取付け段部４３を形成してあ
る。A cylinder head 38 to which the electromagnetic fuel injection valve 30 is attached has a cylinder 39 facing the injection hole 11.
And the injection valve mounting hole 40 is formed, and the injection valve mounting hole 4 is formed.
The first mounting step portion 41, the second mounting step portion 42, and the third mounting step portion 43 whose opening diameters are increased in order are formed in the direction 0 away from the vicinity of the cylinder 39.

【００２８】シリンダーヘッド３８の第１の取付け段部
４１において第１のシール部４４を構成し、シリンダー
ヘッド３８の第３の取付け段部４３において第２のシー
ル部４５を構成する。The first mounting step portion 41 of the cylinder head 38 constitutes the first seal portion 44, and the third mounting step portion 43 of the cylinder head 38 constitutes the second seal portion 45.

【００２９】すなわち、ノズルホルダー３１の先端面３
１Ａと第１の取付け段部４１との間に第１のガスケット
としてコルゲートワッシャ４６を設ける。That is, the tip surface 3 of the nozzle holder 31.
A corrugated washer 46 is provided as a first gasket between 1A and the first mounting step portion 41.

【００３０】第２の取付け段部４２に、ノズルホルダー
３１の段部３１Ｂを対向させる。The step 31B of the nozzle holder 31 is opposed to the second mounting step 42.

【００３１】第３の取付け段部４３とバルブハウジング
３の取付けフランジ４７との間には、第２のガスケット
としてプレートワッシャ４８を設ける。A plate washer 48 is provided as a second gasket between the third mounting step 43 and the mounting flange 47 of the valve housing 3.

【００３２】図２は、コルゲートワッシャ４６の平面
図、図３は、図２のＩＩＩ−ＩＩＩ線断面図であって、
コルゲートワッシャ４６は、断面が波型形状を呈し、こ
の波型部分の山頂部がシリンダーヘッド３８の第１の取
付け段部４１およびノズルホルダー３１の先端面３１Ａ
に当接してそれぞれシール部を構成する。また、中央部
に放射状に突出させた突出部４９がバルブシート７の段
部７Ｂに当接することによってコルゲートワッシャ４６
の脱落を防止している。FIG. 2 is a plan view of the corrugated washer 46, and FIG. 3 is a sectional view taken along line III-III of FIG.
The corrugated washer 46 has a corrugated cross section, and the peaks of this corrugated portion have the first mounting step 41 of the cylinder head 38 and the tip surface 31A of the nozzle holder 31.
And a seal portion is formed. Further, the corrugated washer 46 is formed by the protruding portion 49 that is radially protruded in the central portion abutting on the step portion 7B of the valve seat 7.
Is prevented from falling off.

【００３３】コルゲートワッシャ４６の材料としては、
航空機などに使用されるインコネルに表面処理として銀
メッキを施したものを用いればシール性としては完全で
はあるが、コスト的には全く見合わないので、安価なス
テンレス材料（たとえばＳＵＳ３０４など）ないしは銅
材料、あるいはこれらの材料にテフロンコーティングを
施したものを用いることが好ましい。As the material of the corrugated washer 46,
If Inconel used for aircrafts is silver-plated as the surface treatment, the sealing property will be perfect, but the cost will not be met at all. Therefore, it is cheap stainless steel (such as SUS304) or copper. It is preferable to use materials or materials obtained by applying Teflon coating to these materials.

【００３４】シリンダー３９から所定圧力で直接侵入し
てくる燃焼ガスをこのコルゲートワッシャ４６によって
シールし、第１のシール部４４において燃焼圧力を減圧
するものである。Combustion gas that directly enters from the cylinder 39 at a predetermined pressure is sealed by the corrugated washer 46, and the combustion pressure is reduced at the first seal portion 44.

【００３５】プレートワッシャ４８は、第１のシール部
４４によるシールを完全なものとするためのもので、第
１のシール部４４とは異なる、より外方（噴射孔１１か
ら遠い位置にある第２のシール部４５）においてシール
性を確保するものである。The plate washer 48 is for perfecting the seal by the first seal portion 44, and is different from the first seal portion 44 and is located outside (at a position far from the injection hole 11). The second sealing portion 45) ensures the sealing property.

【００３６】すなわち、バルブハウジング３の取付けフ
ランジ４７を取付けフォーク５０により押さえて、所定
の締付け力でボルト止め（図示せず）することにより第
１のシール部４４および第２のシール部４５における所
定のシール性を確保する。That is, the mounting flange 47 of the valve housing 3 is pressed by the mounting fork 50 and bolted (not shown) with a predetermined tightening force to fix the first seal portion 44 and the second seal portion 45 at predetermined positions. To secure the sealing property of.

【００３７】なお、プレートワッシャ４８の材料として
は、シリンダーヘッド３８と同じ材料のアルミニウムが
望ましい。The plate washer 48 is preferably made of aluminum, which is the same material as the cylinder head 38.

【００３８】図４は、上記締付け力によるコルゲートワ
ッシャ４６の変位に対する取付け荷重の関係（ストロー
ク−荷重特性）を示すグラフであって、ストロークＳの
範囲においては取付け荷重がほぼ一定となることを示し
ており、この取付け荷重の範囲内で、電磁式燃料噴射弁
３０およびシリンダーヘッド３８の加工公差設定に余裕
を持たせることができ、ニードルバルブ１０のリフト量
Ｌの変化が許容範囲内にあるという前述の第二の要求事
項に応えることができる。FIG. 4 is a graph showing the relationship (stroke-load characteristic) of the mounting load with respect to the displacement of the corrugated washer 46 due to the tightening force, and shows that the mounting load is almost constant in the range of the stroke S. Therefore, it is possible to allow a margin for setting the machining tolerance of the electromagnetic fuel injection valve 30 and the cylinder head 38 within the range of the mounting load, and the change in the lift amount L of the needle valve 10 is within the allowable range. The second requirement mentioned above can be met.

【００３９】すなわち、コルゲートワッシャ４６の締付
けストロークＳの範囲内で取付け荷重はたとえば２００
Ｋｇｆとなるが、この荷重はリフト量Ｌの変化が２μｍ
になることに相当し、この変化２μｍはリフト量Ｌの許
容公差範囲内である。That is, the mounting load is, for example, 200 within the tightening stroke S of the corrugated washer 46.
Kgf, but this load changes the lift amount L by 2 μm
This change of 2 μm is within the allowable tolerance range of the lift amount L.

【００４０】しかもコルゲートワッシャ４６（第１のガ
スケット）をノズルホルダー３１の先端面３１Ａと噴射
弁取付け孔４０の第１の取付け段部４１との間に設ける
とともに、プレートワッシャ４８（第２のガスケット）
をバルブハウジング３の取付けフランジ４７と噴射弁取
付け孔４０の第３の取付け段部４３との間に設けただけ
であるので、ノズル周辺寸法は極力小さくすべきという
前述の第三の要求事項にも応えることができる。Moreover, the corrugated washer 46 (first gasket) is provided between the tip surface 31A of the nozzle holder 31 and the first mounting step portion 41 of the injection valve mounting hole 40, and the plate washer 48 (second gasket) is provided. )
Is only provided between the mounting flange 47 of the valve housing 3 and the third mounting step 43 of the injection valve mounting hole 40, the above-mentioned third requirement that the nozzle peripheral dimension should be as small as possible. Can also respond.

【００４１】なお、バルブハウジング３とノズルホルダ
ー３１との間の接合部５１は、これをレーザー溶接など
により一体化するものであるが、この接合部５１は第２
のシール部４５のシール面より噴射孔１１方向よりに設
けてある。The joint 51 between the valve housing 3 and the nozzle holder 31 is formed by laser welding or the like, and this joint 51 is the second joint.
It is provided in the direction of the injection hole 11 from the sealing surface of the sealing portion 45.

【００４２】こうした取付け構造を有する電磁式燃料噴
射弁３０において、エンジン駆動にともなうシリンダー
３９内からの燃焼ガスは第１のシール部４４のコルゲー
トワッシャ４６部分において減圧される。In the electromagnetic fuel injection valve 30 having such a mounting structure, the combustion gas from the inside of the cylinder 39 due to the driving of the engine is decompressed in the corrugated washer 46 portion of the first seal portion 44.

【００４３】第１のシール部４４も通過したわずかな燃
焼ガスは、第２のシール部４５のプレートワッシャ４８
において完全にシールされる。A slight amount of combustion gas that has also passed through the first seal portion 44 is converted into a plate washer 48 of the second seal portion 45.
Is completely sealed at.

【００４４】したがって、耐燃焼圧力性、耐振性、シー
ル性、放熱性などについての前述の第一の要求事項にも
応えることができる。Therefore, it is possible to meet the above-mentioned first requirement regarding the combustion pressure resistance, the vibration resistance, the sealing property, the heat radiation property and the like.

【００４５】なお、バルブハウジング３とノズルホルダ
ー３１との間の接合部５１は第２のシール部４５のシー
ル面より噴射孔１１方向よりに（シリンダー３９側に）
設けてあるため、この接合部５１から万一ガソリン漏れ
が発生した場合でも、第２のシール部４５においてシー
ルすることが可能であり、電磁式燃料噴射弁３０からの
ガソリンが大気中に放出されることを防止することがで
きる。The joint 51 between the valve housing 3 and the nozzle holder 31 is closer to the injection hole 11 than the sealing surface of the second seal 45 (to the cylinder 39 side).
Since it is provided, even if a gasoline leak occurs from this joint portion 51, it is possible to seal at the second seal portion 45, and the gasoline from the electromagnetic fuel injection valve 30 is released to the atmosphere. Can be prevented.

【００４６】[0046]

【発明の効果】以上のように本発明によれば、第１のシ
ール部および第２のシール部という二重シール機構を設
けることにより、筒内噴射システムに対応したシール性
および耐熱性および耐圧力性などに優れた電磁式燃料噴
射弁の取付けを確実に行うことができる。As described above, according to the present invention, by providing the double seal mechanism of the first seal portion and the second seal portion, the sealability, heat resistance and resistance corresponding to the in-cylinder injection system are provided. It is possible to reliably mount the electromagnetic fuel injection valve having excellent pressure characteristics.

【００４７】[0047]

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例による電磁式燃料噴射弁３０
およびその取付け構造を説明するための断面図である。FIG. 1 is an electromagnetic fuel injection valve 30 according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view for explaining the mounting structure and the mounting structure thereof.

【図２】同、コルゲートワッシャ４６の平面図である。FIG. 2 is a plan view of a corrugated washer 46 of the same.

【図３】同、図２のＩＩＩ−ＩＩＩ線断面図である。3 is a sectional view taken along line III-III of FIG.

【図４】同、所定の締付け力によるコルゲートワッシャ
４６の変位に対する取付け荷重の関係（ストローク−荷
重特性）を示すグラフである。FIG. 4 is a graph showing a relationship (stroke-load characteristic) of a mounting load with respect to a displacement of the corrugated washer 46 due to a predetermined tightening force.

【図５】従来の電磁式燃料噴射弁１の断面図である。FIG. 5 is a sectional view of a conventional electromagnetic fuel injection valve 1.

【符号の説明】[Explanation of symbols]

１ 電磁式燃料噴射弁 ２ コネクター ３ バルブハウジング ４ ノズルカバー ５ 磁性体からなる燃料供給用パイプ ６ スプリングシート ７ バルブシート ７Ａ バルブシート７のシート部 ７Ｂ バルブシート７の段部 ８ 電磁コイル ９ 筒状のアーマチャー １０ ニードルバルブ １１ 噴射孔 １２ バルブスプリング １３ 第１の燃料通路 １４ 第２の燃料通路 １５ 第３の燃料通路 １６ バルブストッパー １７ インテークマニホールド １８ 第１のインシュレーター １９ 第２のインシュレーター ２０ フューエルレール ２１ 取付け孔 ３０ 電磁式燃料噴射弁 ３１ ノズルホルダー ３１Ａ ノズルホルダー３１の先端面 ３１Ｂ ノズルホルダー３１の段部 ３２ 平板状のアーマチャー ３３ 連通孔 ３８ シリンダーヘッド ３９ シリンダー ４０ 噴射弁取付け孔 ４１ 第１の取付け段部 ４２ 第２の取付け段部 ４３ 第３の取付け段部 ４４ 第１のシール部 ４５ 第２のシール部 ４６ コルゲートワッシャ（第１のガスケット） ４７ バルブハウジング３の取付けフランジ ４８ プレートワッシャ（第２のガスケット） ４９ 突出部 ５０ 取付けフォーク ５１ バルブハウジング３とノズルホルダー３１との間
の接合部 Ｌ ニードルバルブ１０のリフト量 Ｓ コルゲートワッシャ４６の締付けストローク1 Electromagnetic Fuel Injection Valve 2 Connector 3 Valve Housing 4 Nozzle Cover 5 Fuel Supply Pipe Made of Magnetic Material 6 Spring Seat 7 Valve Seat 7A Valve Seat 7 Seat 7B Valve Seat 7 Step 8 Electromagnetic Coil 9 Cylindrical Armature 10 Needle valve 11 Injection hole 12 Valve spring 13 First fuel passage 14 Second fuel passage 15 Third fuel passage 16 Valve stopper 17 Intake manifold 18 First insulator 19 Second insulator 20 Fuel rail 21 Mounting hole 30 Electromagnetic Fuel Injection Valve 31 Nozzle Holder 31A Tip Surface of Nozzle Holder 31B Stepped Portion of Nozzle Holder 31 Flat Armature 33 Communication Hole 38 Cylinder Head 39 Cylinder 40 Injection Valve Installation Hole 41 First mounting step 42 Second mounting step 43 Third mounting step 44 First sealing part 45 Second sealing part 46 Corrugated washer (first gasket) 47 Mounting flange of valve housing 3 48 Plate Washer (Second Gasket) 49 Projection 50 Mounting Fork 51 Joint between Valve Housing 3 and Nozzle Holder 31 L Lift of Needle Valve 10 S Tightening Stroke of Corrugated Washer 46

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 バルブハウジングと、 このバルブハウジングに設けた電磁コイルと、 この電磁コイルの励磁に応答するアーマチャーと、 燃料の噴射孔を形成したバルブシートと、 このバルブシートを固定するノズルホルダーと、 前記電磁コイルの励磁に応じて前記アーマチャーととも
に前記バルブシートのシート部からリフトすることによ
り前記噴射孔からエンジンのシリンダー内に燃料を噴射
可能とするニードルバルブと、を有する電磁式燃料噴射
弁を、該エンジンのシリンダーヘッドの取付け孔に取り
付ける電磁式燃料噴射弁の取付け構造であって、 前記シリンダーヘッドの取付け孔の、前記シリンダーに
近接した位置において、当該電磁式燃料噴射弁との間に
第１のガスケットを配置した第１のシール部と、 この第１のシール部より前記シリンダーから離れた位置
において、当該電磁式燃料噴射弁との間に第２のガスケ
ットを配置した第２のシール部と、 を有することを特徴とする電磁式燃料噴射弁の取付け構
造。1. A valve housing, an electromagnetic coil provided in the valve housing, an armature responsive to the excitation of the electromagnetic coil, a valve seat having a fuel injection hole, and a nozzle holder for fixing the valve seat. An electromagnetic fuel injection valve having a needle valve capable of injecting fuel into the cylinder of the engine from the injection hole by lifting from the seat portion of the valve seat together with the armature according to the excitation of the electromagnetic coil. A mounting structure for an electromagnetic fuel injection valve mounted in a mounting hole of a cylinder head of the engine, wherein the mounting hole of the cylinder head is located between the electromagnetic fuel injection valve and the electromagnetic fuel injection valve at a position close to the cylinder. The first seal part in which the first gasket is arranged and the first seal part At a position away from the cylinder mounting structure of the electromagnetic fuel injection valve, characterized in that it comprises a second seal portion and the second gasket is disposed, the between the electromagnetic fuel injection valve. 【請求項２】 前記第１のガスケットは、これを断面
波型としたことを特徴とする請求項１記載の電磁式燃料
噴射弁の取付け構造。2. The mounting structure for an electromagnetic fuel injection valve according to claim 1, wherein the first gasket has a corrugated cross section. 【請求項３】 前記第１のガスケットは、ステンレス
材、銅材、あるいはこれらにテフロンコーティングを施
した材料のうちいずれかの材料からこれを構成したこと
を特徴とする請求項１記載の電磁式燃料噴射弁の取付け
構造。3. The electromagnetic type according to claim 1, wherein the first gasket is made of a stainless material, a copper material, or a material obtained by applying a Teflon coating to these materials. Fuel injection valve mounting structure. 【請求項４】 バルブハウジングと、 このバルブハウジングに設けた電磁コイルと、 この電磁コイルの励磁に応答するアーマチャーと、 燃料の噴射孔を形成したバルブシートと、 このバルブシートを固定するノズルホルダーと、 前記電磁コイルの励磁に応じて前記アーマチャーととも
に前記バルブシートのシート部からリフトすることによ
り前記噴射孔からエンジンのシリンダー内に燃料を噴射
可能とするニードルバルブと、を有する電磁式燃料噴射
弁であって、 当該電磁式燃料噴射弁を取り付ける前記エンジンのシリ
ンダーヘッドの取付け孔の、前記シリンダーに近接した
位置において第１のガスケットを配置した第１のシール
部と、 前記シリンダーから離れた位置において第２のガスケッ
トを配置した第２のシール部と、を設けるとともに、 前記バルブハウジングと前記ノズルホルダーとの接合部
を、この第２のシール部よりも前記シリンダー側に配置
したことを特徴とする電磁式燃料噴射弁。4. A valve housing, an electromagnetic coil provided in the valve housing, an armature responsive to the excitation of the electromagnetic coil, a valve seat having a fuel injection hole, and a nozzle holder for fixing the valve seat. A needle valve that allows fuel to be injected from the injection hole into the cylinder of the engine by lifting from the seat portion of the valve seat together with the armature according to the excitation of the electromagnetic coil, There is a first seal portion having a first gasket at a position close to the cylinder in a mounting hole of the cylinder head of the engine to which the electromagnetic fuel injection valve is attached, and a first seal portion at a position distant from the cylinder. And a second seal portion in which the second gasket is arranged, Moni, wherein the joint portion of the valve housing and said nozzle holder, an electromagnetic fuel injection valve, characterized in that disposed on the cylinder side of the second seal portion.
JP7027681A 1995-01-25 1995-01-25 Electromagnetic type fuel injection valve and mounting structure thereof Pending JPH08200182A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP7027681A JPH08200182A (en) 1995-01-25 1995-01-25 Electromagnetic type fuel injection valve and mounting structure thereof
DE19600403A DE19600403C2 (en) 1995-01-25 1996-01-08 Mounting arrangement for an electromagnetic fuel injector
US08/585,477 US5706787A (en) 1995-01-25 1996-01-16 Electromagnetic fuel injection valve and attachment structure thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7027681A JPH08200182A (en) 1995-01-25 1995-01-25 Electromagnetic type fuel injection valve and mounting structure thereof

Publications (1)

Publication Number Publication Date
JPH08200182A true JPH08200182A (en) 1996-08-06

Family

ID=12227721

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7027681A Pending JPH08200182A (en) 1995-01-25 1995-01-25 Electromagnetic type fuel injection valve and mounting structure thereof

Country Status (3)

Country Link
US (1) US5706787A (en)
JP (1) JPH08200182A (en)
DE (1) DE19600403C2 (en)

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Also Published As

Publication number Publication date
DE19600403A1 (en) 1996-08-01
DE19600403C2 (en) 1999-01-14
US5706787A (en) 1998-01-13

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